#define GET_HUB_ID	0x74
#define RETURN_GET_HUB_ID 0xF4
#define GET_ESL_ID	0x62
#define COMMON_ADDR 0xFF
#define LENGTH_BIT	0
#define PID_BIT		1
#define GID_BIT		2
#define SID_BIT		3
#define MSG_BIT		4
#define PKT_PRO_BIT	5
#define MODULE_BIT	6